- #1

ivysmerlin

- 2

- 0

## Homework Statement

Find the instantaneous rate of change of V with respect to r when r=5 micrometers

## Homework Equations

V=4/3pi(r^3)

## The Attempt at a Solution

would you just take the derivative? and if so, wouldn't it just be zero, because it comes out to be a real number, right? but that doesn't seem right...